Literature DB >> 21523156

rac-6-Hy-droxy-2,5,7,8-tetra-methyl-chroman-2-carboxamide from synchrotron data.

Krzysztof Brzezinski, Zbigniew Dauter, Aneta Baj, Piotr Wałejko, Stanisław Witkowski.   

Abstract

The crystal structure of the title water-soluble analogue of vitamin E, trolox amide, C(14)H(19)NO(3), solved and refined against synchrotron diffraction data, contains two mol-ecules in the asymmetric unit. In both molecules, the heterocyclic ring is in a half-chair conformation. The crystal packing features a herring-bone pattern generated by N-H⋯O hydrogen bonds between the hy-droxy and amide groups. O-H⋯O hydrogen bonds also occur.

Entities:  

Year:  2011        PMID: 21523156      PMCID: PMC3051603          DOI: 10.1107/S1600536811002807

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For background to the chemistry of trolox, its substituted amides and their applications as anti­oxidants and anti-inflamatory agents, see: Ross et al. (1995 ▶); Scott et al. (1974 ▶); Cort et al. (1975 ▶); Cohen et al. (1981 ▶); Walther et al. (1991 ▶); Silver et al. (1992 ▶); Netscher & Gautschi (1992 ▶); Van Ginkel et al. (1992) ▶; Moulin et al. (1998 ▶); Vajragupta et al. (2000 ▶); Koufaki et al. (2010 ▶). For the use of trolox as an inter­mediate for the synthesis of natural tocols such as vitamin E and α-tocotrienol, see: Cohen et al. (1979 ▶); Hyatt & Skelton (1997 ▶); Sakito & Suzokamo (1982 ▶); Sugai et al. (1991 ▶).

Experimental

Crystal data

C14H19NO3 M = 249.31 Monoclinic, a = 9.11 (1) Å b = 17.92 (2) Å c = 15.95 (1) Å β = 100.43 (1)° V = 2561 (4) Å3 Z = 8 Synchrotron radiation λ = 0.59040 Å μ = 0.06 mm−1 T = 100 K 0.2 × 0.05 × 0.04 mm

Data collection

MAR315 CCD diffractometer Absorption correction: multi-scan (SCALEPACK; Otwinowski & Minor, 2003 ▶) T min = 0.988, T max = 0.997 14016 measured reflections 6360 independent reflections 5153 reflections with I > 2σ(I) R int = 0.030

Refinement

R[F 2 > 2σ(F 2)] = 0.050 wR(F 2) = 0.147 S = 1.08 6360 reflections 327 parameters H-atom parameters constrained Δρmax = 0.41 e Å−3 Δρmin = −0.25 e Å−3 Data collection: NECAT APS beamline software; cell refinement: HKL-2000 (Otwinowski & Minor, 1997 ▶); data reduction: HKL-2000; program(s) used to solve structure: SHELXD (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEP-3 (Farrugia, 1997 ▶) and pyMOL (DeLano, 2002 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536811002807/kp2304sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536811002807/kp2304Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C14H19NO3F(000) = 1072
Mr = 249.31Dx = 1.293 Mg m3
Monoclinic, P21/cMelting point: 492 K
Hall symbol: -P 2ybcSynchrotron radiation, λ = 0.59040 Å
a = 9.11 (1) ÅCell parameters from 6360 reflections
b = 17.92 (2) Åθ = 1.4–23.5°
c = 15.95 (1) ŵ = 0.06 mm1
β = 100.43 (1)°T = 100 K
V = 2561 (4) Å3Needle, colourless
Z = 80.2 × 0.05 × 0.04 mm
MAR315 CCD diffractometer6360 independent reflections
Radiation source: NECAT 24ID-C synchrotron beamline APS, USA5153 reflections with I > 2σ(I)
Si111 double crystalRint = 0.030
ω scansθmax = 23.5°, θmin = 1.4°
Absorption correction: multi-scan (SCALEPACK; Otwinowski et al., 2003)h = 0→12
Tmin = 0.988, Tmax = 0.997k = 0→24
14016 measured reflectionsl = −21→20
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.050Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.147H-atom parameters constrained
S = 1.08w = 1/[σ2(Fo2) + (0.0846P)2 + 0.4358P] where P = (Fo2 + 2Fc2)/3
6360 reflections(Δ/σ)max < 0.001
327 parametersΔρmax = 0.41 e Å3
0 restraintsΔρmin = −0.25 e Å3
Experimental. The crystal was mounted with vaseline on a pin attached capillary. Upon mounting, the crystal was quenched to 100 K in a nitrogen-gas stream supplied by an Oxford Cryo-Jet. Diffraction data were measured at the station 24-ID—C of the APS synchrotron by rotation method.
Geometry. All e.s.d.'s are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
Refinement. Refinement of F2 against all reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2σ(F2) is used only for calculating R-factors etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F.
xyzUiso*/Ueq
O10.61019 (10)0.45827 (5)0.16067 (5)0.0245 (2)
C20.47454 (14)0.45990 (7)0.19461 (8)0.0237 (3)
C30.34104 (15)0.47162 (7)0.12365 (8)0.0268 (3)
H3A0.35150.51980.09500.032*
H3B0.24870.47360.14810.032*
C40.32903 (14)0.40842 (7)0.05855 (8)0.0247 (3)
H4A0.28870.36330.08220.030*
H4B0.25870.42310.00630.030*
C50.48962 (14)0.34738 (7)−0.03638 (8)0.0231 (3)
C60.62994 (14)0.33351 (7)−0.05616 (8)0.0235 (3)
C70.76145 (14)0.36122 (7)−0.00604 (8)0.0232 (3)
C80.75096 (14)0.40469 (7)0.06572 (8)0.0224 (2)
C90.61017 (14)0.41713 (6)0.08636 (7)0.0215 (2)
C100.47925 (14)0.39050 (7)0.03598 (8)0.0217 (2)
C110.45591 (14)0.38690 (7)0.24307 (8)0.0233 (3)
O120.33708 (11)0.37440 (5)0.26791 (6)0.0303 (2)
N130.57098 (13)0.34076 (6)0.25872 (7)0.0271 (2)
H13A0.56470.29950.28770.033*
H13B0.65380.35140.24010.033*
C140.49388 (17)0.52489 (7)0.25803 (9)0.0312 (3)
H14A0.40950.52590.28840.047*
H14B0.49750.57200.22720.047*
H14C0.58700.51840.29910.047*
C150.35081 (15)0.31770 (8)−0.09261 (9)0.0299 (3)
H15A0.30000.3584−0.12740.045*
H15B0.28380.2968−0.05700.045*
H15C0.37840.2787−0.12990.045*
O160.63187 (11)0.29210 (6)−0.12892 (6)0.0325 (2)
H16A0.71830.2925−0.14040.049*
C170.91159 (15)0.34490 (8)−0.02946 (9)0.0304 (3)
H17A0.91230.2938−0.05130.046*
H17B0.98980.35020.02120.046*
H17C0.93010.3801−0.07340.046*
C180.88847 (15)0.43836 (8)0.12025 (9)0.0302 (3)
H18A0.85810.47290.16150.045*
H18B0.94620.46540.08380.045*
H18C0.95000.39850.15070.045*
O210.09463 (10)0.20376 (5)0.15518 (6)0.0261 (2)
C22−0.03768 (14)0.18816 (7)0.18944 (8)0.0246 (3)
C23−0.17485 (14)0.19491 (8)0.11915 (9)0.0277 (3)
H23A−0.18170.24640.09630.033*
H23B−0.26580.18490.14310.033*
C24−0.16637 (14)0.13979 (8)0.04698 (9)0.0278 (3)
H24A−0.20010.09010.06290.033*
H24B−0.23500.1563−0.00510.033*
C250.01411 (14)0.09450 (7)−0.04523 (8)0.0242 (3)
C260.16025 (14)0.08797 (7)−0.06026 (8)0.0244 (3)
C270.28233 (14)0.11907 (7)−0.00506 (8)0.0236 (3)
C280.25737 (14)0.15918 (7)0.06677 (8)0.0229 (3)
C290.11127 (14)0.16416 (7)0.08231 (8)0.0228 (3)
C30−0.01047 (14)0.13307 (7)0.02768 (8)0.0235 (3)
C31−0.04526 (15)0.24820 (7)0.25651 (8)0.0270 (3)
O32−0.15782 (11)0.25283 (6)0.28939 (6)0.0353 (2)
N330.07066 (14)0.29294 (7)0.27773 (8)0.0360 (3)
H33A0.06960.32770.31660.043*
H33B0.14900.28800.25300.043*
C34−0.02493 (16)0.11133 (7)0.23290 (9)0.0300 (3)
H34A−0.10730.10490.26420.045*
H34B0.07040.10790.27270.045*
H34C−0.02980.07220.18960.045*
C35−0.11451 (15)0.06001 (8)−0.10581 (8)0.0291 (3)
H35A−0.08270.0480−0.15970.044*
H35B−0.19790.0954−0.11640.044*
H35C−0.14650.0143−0.08060.044*
O360.17961 (12)0.04723 (6)−0.13154 (6)0.0315 (2)
H36A0.24160.0691−0.15610.047*
C370.43909 (15)0.10894 (8)−0.02105 (9)0.0294 (3)
H37A0.46980.1537−0.04860.044*
H37B0.44260.0657−0.05820.044*
H37C0.50690.10080.03330.044*
C380.38410 (14)0.19683 (7)0.12563 (8)0.0268 (3)
H38A0.43580.23090.09270.040*
H38B0.45430.15900.15320.040*
H38C0.34450.22500.16920.040*
U11U22U33U12U13U23
O10.0261 (5)0.0241 (4)0.0258 (4)−0.0053 (3)0.0114 (4)−0.0031 (3)
C20.0277 (6)0.0182 (5)0.0282 (6)0.0000 (5)0.0130 (5)−0.0012 (4)
C30.0281 (6)0.0216 (6)0.0326 (7)0.0044 (5)0.0104 (5)0.0027 (5)
C40.0230 (6)0.0242 (6)0.0285 (6)−0.0001 (5)0.0091 (5)0.0002 (5)
C50.0243 (6)0.0203 (6)0.0262 (6)−0.0031 (5)0.0083 (5)0.0012 (5)
C60.0266 (6)0.0203 (6)0.0260 (6)−0.0020 (5)0.0112 (5)−0.0013 (4)
C70.0231 (6)0.0214 (6)0.0273 (6)−0.0016 (5)0.0104 (5)0.0033 (5)
C80.0231 (6)0.0203 (6)0.0255 (6)−0.0023 (5)0.0086 (5)0.0040 (4)
C90.0256 (6)0.0178 (5)0.0232 (6)−0.0030 (4)0.0099 (5)0.0010 (4)
C100.0225 (6)0.0185 (5)0.0261 (6)−0.0015 (4)0.0097 (5)0.0025 (4)
C110.0280 (6)0.0214 (6)0.0225 (6)−0.0009 (5)0.0103 (5)−0.0023 (4)
O120.0315 (5)0.0293 (5)0.0349 (5)−0.0014 (4)0.0189 (4)0.0001 (4)
N130.0286 (6)0.0229 (5)0.0320 (6)0.0012 (4)0.0117 (5)0.0041 (4)
C140.0400 (8)0.0214 (6)0.0349 (7)−0.0012 (5)0.0140 (6)−0.0062 (5)
C150.0259 (7)0.0327 (7)0.0323 (7)−0.0054 (5)0.0087 (5)−0.0049 (5)
O160.0290 (5)0.0368 (5)0.0349 (5)−0.0045 (4)0.0144 (4)−0.0126 (4)
C170.0240 (6)0.0363 (7)0.0340 (7)−0.0015 (5)0.0136 (5)−0.0005 (6)
C180.0252 (7)0.0353 (7)0.0309 (7)−0.0073 (5)0.0073 (5)−0.0018 (5)
O210.0220 (4)0.0269 (5)0.0332 (5)−0.0036 (3)0.0152 (4)−0.0040 (4)
C220.0223 (6)0.0229 (6)0.0322 (6)0.0006 (5)0.0144 (5)0.0041 (5)
C230.0209 (6)0.0299 (7)0.0353 (7)0.0029 (5)0.0131 (5)0.0063 (5)
C240.0193 (6)0.0312 (7)0.0342 (7)−0.0012 (5)0.0086 (5)0.0048 (5)
C250.0245 (6)0.0224 (6)0.0269 (6)−0.0027 (5)0.0078 (5)0.0066 (5)
C260.0284 (6)0.0222 (6)0.0250 (6)−0.0023 (5)0.0113 (5)0.0034 (5)
C270.0226 (6)0.0225 (6)0.0285 (6)−0.0011 (5)0.0120 (5)0.0043 (5)
C280.0214 (6)0.0208 (6)0.0286 (6)−0.0011 (4)0.0102 (5)0.0036 (5)
C290.0226 (6)0.0203 (6)0.0279 (6)0.0001 (4)0.0112 (5)0.0023 (4)
C300.0200 (6)0.0226 (6)0.0298 (6)−0.0006 (4)0.0098 (5)0.0056 (5)
C310.0278 (7)0.0237 (6)0.0330 (7)0.0047 (5)0.0146 (5)0.0040 (5)
O320.0342 (6)0.0344 (5)0.0434 (6)0.0027 (4)0.0238 (5)0.0012 (4)
N330.0321 (6)0.0329 (6)0.0473 (7)−0.0029 (5)0.0189 (5)−0.0144 (5)
C340.0332 (7)0.0234 (6)0.0342 (7)−0.0021 (5)0.0082 (6)0.0041 (5)
C350.0282 (7)0.0302 (7)0.0292 (6)−0.0047 (5)0.0056 (5)0.0049 (5)
O360.0366 (6)0.0325 (5)0.0296 (5)−0.0084 (4)0.0173 (4)−0.0026 (4)
C370.0246 (6)0.0331 (7)0.0339 (7)−0.0005 (5)0.0143 (5)−0.0004 (5)
C380.0224 (6)0.0274 (6)0.0326 (7)−0.0026 (5)0.0104 (5)−0.0008 (5)
O1—C91.3958 (18)O21—C291.3933 (18)
O1—C21.4364 (19)O21—C221.4381 (18)
C2—C31.518 (2)C22—C231.525 (2)
C2—C141.532 (2)C22—C311.527 (2)
C2—C111.544 (2)C22—C341.536 (2)
C3—C41.527 (2)C23—C241.529 (2)
C3—H3A0.9900C23—H23A0.9900
C3—H3B0.9900C23—H23B0.9900
C4—C101.511 (2)C24—C301.511 (2)
C4—H4A0.9900C24—H24A0.9900
C4—H4B0.9900C24—H24B0.9900
C5—C61.393 (2)C25—C261.400 (2)
C5—C101.406 (2)C25—C301.405 (2)
C5—C151.509 (2)C25—C351.510 (2)
C6—O161.3803 (18)C26—O361.3889 (18)
C6—C71.405 (2)C26—C271.403 (2)
C7—C81.402 (2)C27—C281.406 (2)
C7—C171.510 (2)C27—C371.506 (2)
C8—C91.399 (2)C28—C291.400 (2)
C8—C181.515 (2)C28—C381.509 (2)
C9—C101.396 (2)C29—C301.396 (2)
C11—O121.2387 (18)C31—O321.2362 (18)
C11—N131.3230 (19)C31—N331.320 (2)
N13—H13A0.8800N33—H33A0.8800
N13—H13B0.8800N33—H33B0.8800
C14—H14A0.9800C34—H34A0.9800
C14—H14B0.9800C34—H34B0.9800
C14—H14C0.9800C34—H34C0.9800
C15—H15A0.9800C35—H35A0.9800
C15—H15B0.9800C35—H35B0.9800
C15—H15C0.9800C35—H35C0.9800
O16—H16A0.8400O36—H36A0.8400
C17—H17A0.9800C37—H37A0.9800
C17—H17B0.9800C37—H37B0.9800
C17—H17C0.9800C37—H37C0.9800
C18—H18A0.9800C38—H38A0.9800
C18—H18B0.9800C38—H38B0.9800
C18—H18C0.9800C38—H38C0.9800
C9—O1—C2117.57 (9)C29—O21—C22116.31 (10)
O1—C2—C3110.46 (12)O21—C22—C23109.68 (12)
O1—C2—C14105.09 (11)O21—C22—C31106.05 (10)
C3—C2—C14111.59 (11)C23—C22—C31108.91 (11)
O1—C2—C11110.57 (10)O21—C22—C34110.22 (10)
C3—C2—C11110.15 (11)C23—C22—C34112.81 (11)
C14—C2—C11108.87 (12)C31—C22—C34108.94 (12)
C2—C3—C4110.69 (11)C22—C23—C24110.84 (11)
C2—C3—H3A109.5C22—C23—H23A109.5
C4—C3—H3A109.5C24—C23—H23A109.5
C2—C3—H3B109.5C22—C23—H23B109.5
C4—C3—H3B109.5C24—C23—H23B109.5
H3A—C3—H3B108.1H23A—C23—H23B108.1
C10—C4—C3111.29 (11)C30—C24—C23112.47 (11)
C10—C4—H4A109.4C30—C24—H24A109.1
C3—C4—H4A109.4C23—C24—H24A109.1
C10—C4—H4B109.4C30—C24—H24B109.1
C3—C4—H4B109.4C23—C24—H24B109.1
H4A—C4—H4B108.0H24A—C24—H24B107.8
C6—C5—C10118.98 (11)C26—C25—C30118.81 (11)
C6—C5—C15120.47 (12)C26—C25—C35120.54 (13)
C10—C5—C15120.54 (12)C30—C25—C35120.64 (12)
O16—C6—C5115.99 (11)O36—C26—C25116.73 (11)
O16—C6—C7121.94 (12)O36—C26—C27121.25 (12)
C5—C6—C7122.06 (13)C25—C26—C27121.99 (13)
C8—C7—C6118.93 (12)C28—C27—C26119.20 (12)
C8—C7—C17120.54 (11)C28—C27—C37119.85 (11)
C6—C7—C17120.53 (13)C26—C27—C37120.93 (13)
C9—C8—C7118.79 (11)C29—C28—C27118.43 (11)
C9—C8—C18119.98 (12)C29—C28—C38120.41 (12)
C7—C8—C18121.23 (12)C27—C28—C38121.16 (12)
O1—C9—C8115.15 (11)O21—C29—C30121.98 (12)
O1—C9—C10122.55 (11)O21—C29—C28115.50 (11)
C8—C9—C10122.30 (12)C30—C29—C28122.50 (13)
C9—C10—C5118.88 (12)C29—C30—C25119.02 (12)
C9—C10—C4120.42 (12)C29—C30—C24120.70 (12)
C5—C10—C4120.70 (11)C25—C30—C24120.28 (11)
O12—C11—N13122.36 (13)O32—C31—N33122.47 (14)
O12—C11—C2119.66 (11)O32—C31—C22119.38 (12)
N13—C11—C2117.95 (12)N33—C31—C22118.15 (12)
C11—N13—H13A120.0C31—N33—H33A120.0
C11—N13—H13B120.0C31—N33—H33B120.0
H13A—N13—H13B120.0H33A—N33—H33B120.0
C2—C14—H14A109.5C22—C34—H34A109.5
C2—C14—H14B109.5C22—C34—H34B109.5
H14A—C14—H14B109.5H34A—C34—H34B109.5
C2—C14—H14C109.5C22—C34—H34C109.5
H14A—C14—H14C109.5H34A—C34—H34C109.5
H14B—C14—H14C109.5H34B—C34—H34C109.5
C5—C15—H15A109.5C25—C35—H35A109.5
C5—C15—H15B109.5C25—C35—H35B109.5
H15A—C15—H15B109.5H35A—C35—H35B109.5
C5—C15—H15C109.5C25—C35—H35C109.5
H15A—C15—H15C109.5H35A—C35—H35C109.5
H15B—C15—H15C109.5H35B—C35—H35C109.5
C6—O16—H16A109.5C26—O36—H36A109.5
C7—C17—H17A109.5C27—C37—H37A109.5
C7—C17—H17B109.5C27—C37—H37B109.5
H17A—C17—H17B109.5H37A—C37—H37B109.5
C7—C17—H17C109.5C27—C37—H37C109.5
H17A—C17—H17C109.5H37A—C37—H37C109.5
H17B—C17—H17C109.5H37B—C37—H37C109.5
C8—C18—H18A109.5C28—C38—H38A109.5
C8—C18—H18B109.5C28—C38—H38B109.5
H18A—C18—H18B109.5H38A—C38—H38B109.5
C8—C18—H18C109.5C28—C38—H38C109.5
H18A—C18—H18C109.5H38A—C38—H38C109.5
H18B—C18—H18C109.5H38B—C38—H38C109.5
C9—O1—C2—C3−43.88 (14)C29—O21—C22—C23−51.64 (14)
C9—O1—C2—C14−164.37 (10)C29—O21—C22—C31−169.10 (10)
C9—O1—C2—C1178.31 (14)C29—O21—C22—C3473.14 (14)
O1—C2—C3—C460.30 (13)O21—C22—C23—C2459.96 (14)
C14—C2—C3—C4176.82 (11)C31—C22—C23—C24175.62 (10)
C11—C2—C3—C4−62.14 (14)C34—C22—C23—C24−63.30 (15)
C2—C3—C4—C10−44.86 (15)C22—C23—C24—C30−39.37 (15)
C10—C5—C6—O16−178.75 (10)C30—C25—C26—O36177.90 (11)
C15—C5—C6—O160.21 (17)C35—C25—C26—O36−1.46 (17)
C10—C5—C6—C70.03 (18)C30—C25—C26—C27−0.36 (18)
C15—C5—C6—C7178.99 (11)C35—C25—C26—C27−179.72 (11)
O16—C6—C7—C8178.19 (11)O36—C26—C27—C28−179.33 (11)
C5—C6—C7—C8−0.53 (18)C25—C26—C27—C28−1.15 (18)
O16—C6—C7—C17−1.37 (18)O36—C26—C27—C37−0.33 (18)
C5—C6—C7—C17179.92 (12)C25—C26—C27—C37177.85 (12)
C6—C7—C8—C91.86 (17)C26—C27—C28—C292.41 (17)
C17—C7—C8—C9−178.58 (11)C37—C27—C28—C29−176.60 (11)
C6—C7—C8—C18−177.76 (11)C26—C27—C28—C38−176.99 (11)
C17—C7—C8—C181.80 (18)C37—C27—C28—C384.00 (18)
C2—O1—C9—C8−167.53 (10)C22—O21—C29—C3022.81 (16)
C2—O1—C9—C1012.70 (16)C22—O21—C29—C28−158.56 (11)
C7—C8—C9—O1177.40 (10)C27—C28—C29—O21179.10 (10)
C18—C8—C9—O1−2.97 (16)C38—C28—C29—O21−1.49 (17)
C7—C8—C9—C10−2.83 (18)C27—C28—C29—C30−2.28 (18)
C18—C8—C9—C10176.80 (11)C38—C28—C29—C30177.13 (11)
O1—C9—C10—C5−177.91 (10)O21—C29—C30—C25179.31 (11)
C8—C9—C10—C52.34 (18)C28—C29—C30—C250.78 (18)
O1—C9—C10—C42.66 (17)O21—C29—C30—C24−1.47 (18)
C8—C9—C10—C4−177.10 (11)C28—C29—C30—C24179.99 (11)
C6—C5—C10—C9−0.90 (17)C26—C25—C30—C290.56 (18)
C15—C5—C10—C9−179.86 (11)C35—C25—C30—C29179.91 (11)
C6—C5—C10—C4178.53 (11)C26—C25—C30—C24−178.66 (11)
C15—C5—C10—C4−0.43 (18)C35—C25—C30—C240.69 (18)
C3—C4—C10—C914.64 (16)C23—C24—C30—C2911.06 (17)
C3—C4—C10—C5−164.78 (11)C23—C24—C30—C25−169.73 (11)
O1—C2—C11—O12−171.35 (11)O21—C22—C31—O32171.96 (11)
C3—C2—C11—O12−48.97 (16)C23—C22—C31—O3253.99 (16)
C14—C2—C11—O1273.68 (15)C34—C22—C31—O32−69.42 (15)
O1—C2—C11—N1310.66 (15)O21—C22—C31—N33−8.72 (16)
C3—C2—C11—N13133.04 (13)C23—C22—C31—N33−126.69 (14)
C14—C2—C11—N13−104.31 (13)C34—C22—C31—N33109.89 (14)
D—H···AD—HH···AD···AD—H···A
N13—H13A···O16i0.882.132.971 (2)160
N13—H13B···O32ii0.882.492.896 (3)109
O16—H16A···O32iii0.841.912.631 (2)143
N33—H33B···O120.882.292.861 (3)123
N33—H33A···O36i0.882.533.281 (3)143
O36—H36A···O12iv0.841.912.727 (2)165
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N13—H13A⋯O16i0.882.132.971 (2)160
N13—H13B⋯O32ii0.882.492.896 (3)109
O16—H16A⋯O32iii0.841.912.631 (2)143
N33—H33B⋯O120.882.292.861 (3)123
N33—H33A⋯O36i0.882.533.281 (3)143
O36—H36A⋯O12iv0.841.912.727 (2)165

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .

  6 in total

1.  Antioxidant activity and stability of 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid.

Authors:  W M Cort; J W Scott; M Araujo; W J Mergens; M A Cannalonga; M Osadca; H Harley; D R Parrish; W R Pool
Journal:  J Am Oil Chem Soc       Date:  1975-06       Impact factor: 1.849

2.  Multiparametric scaling of diffraction intensities.

Authors:  Zbyszek Otwinowski; Dominika Borek; Wladyslaw Majewski; Wladek Minor
Journal:  Acta Crystallogr A       Date:  2003-04-25       Impact factor: 2.290

3.  Chroman amide and nicotinyl amide derivatives: inhibition of lipid peroxidation and protection against head trauma.

Authors:  O Vajragupta; S Toasaksiri; C Boonyarat; Y Wongkrajang; P Peungvicha; H Watanabe; P Boonchoong
Journal:  Free Radic Res       Date:  2000-02

4.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

5.  Synthesis of a second generation chroman/catechol hybrids and evaluation of their activity in protecting neuronal cells from oxidative stress-induced cell death.

Authors:  Maria Koufaki; Elissavet Theodorou; Xanthippi Alexi; Michael N Alexis
Journal:  Bioorg Med Chem       Date:  2010-04-21       Impact factor: 3.641

6.  Partitioning and antioxidant action of the water-soluble antioxidant, Trolox, between the aqueous and lipid phases of phosphatidylcholine membranes: 14C tracer and product studies.

Authors:  L R Barclay; J D Artz; J J Mowat
Journal:  Biochim Biophys Acta       Date:  1995-07-06
  6 in total

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